package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO orderSumbit(OrdersSubmitDTO ordersSubmitDTO) {

        //1.处理各种业务异常（地址簿为空，购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        String address = addressBook.getProvinceName()+addressBook.getDistrictName()+addressBook.getDetail();

        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList =
                shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList==null || shoppingCartList.size()==0){
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2.向订单表插入一条数据
        Orders orders = new Orders();
        orders = Orders.builder()
                .orderTime(LocalDateTime.now())
                .payStatus(Orders.UN_PAID)
                .status(Orders.PENDING_PAYMENT)
                .number(String.valueOf(System.currentTimeMillis()))
                .phone(addressBook.getPhone())
                .consignee(addressBook.getConsignee())
                .userId(userId)
                .address(address)
                .build();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //3.向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细相关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        //4.清空当前用户的购物车
        shoppingCartMapper.deleteByUserId(userId);

        //5.封装Vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .build();


        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        //根据订单号获取订单
        Orders order = orderMapper.getByNumber(ordersPaymentDTO.getOrderNumber());
        order.setStatus(Orders.TO_BE_CONFIRMED);
        order.setPayStatus(Orders.PAID);
        order.setCheckoutTime(LocalDateTime.now());
        orderMapper.update(order);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",order.getId());
        map.put("content","订单号"+order.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        OrderPaymentVO orderPaymentVO = OrderPaymentVO.builder()
                .nonceStr(String.valueOf(System.currentTimeMillis()))
                .paySign(String.valueOf(System.currentTimeMillis()))
                .timeStamp(String.valueOf(System.currentTimeMillis()))
                .signType(String.valueOf(System.currentTimeMillis()))
                .packageStr(String.valueOf(System.currentTimeMillis()))
                .build();
        return orderPaymentVO;
    }

    /**
     * 订单分页查询
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult page(int page, int pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);
        OrdersPageQueryDTO ordersDTO = new OrdersPageQueryDTO();
        ordersDTO.setUserId(BaseContext.getCurrentId());
        ordersDTO.setStatus(status);
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersDTO);

        List<OrderVO> list = new ArrayList<>();
        if (ordersPage!=null&&ordersPage.size()>0){
            for (Orders orders : ordersPage) {
                long orderId = orders.getId();
                List<OrderDetail> orderDetailList =  orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);

                list.add(orderVO);
            }
        }

        return new PageResult(ordersPage.getTotal(),list);
    }

    /**
     * 获取订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        Orders order = orderMapper.getById(id);

        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order,orderVO);
        orderVO.setOrderDetailList(orderDetails);

        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void cancel(Long id) {
        Orders order = new Orders();
        order.setId(id);
        order.setUserId(BaseContext.getCurrentId());
        order.setStatus(Orders.CANCELLED);
        order.setPayStatus(Orders.REFUND);
        orderMapper.update(order);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    @Transactional
    public void repetition(Long id) {
        //获得旧订单的数据
        Orders oldOrder = orderMapper.getById(id);
        List<OrderDetail> oldDetails = orderDetailMapper.getByOrderId(id);

        Orders newOrders = new Orders();
        List<OrderDetail> newDetails = new ArrayList<>();

        //新的订单数据处理
        BeanUtils.copyProperties(oldOrder,newOrders);
        newOrders.setId(null);
        newOrders.setNumber(String.valueOf(System.currentTimeMillis()));
        newOrders.setStatus(Orders.PENDING_PAYMENT);
        newOrders.setPayStatus(Orders.UN_PAID);
        newOrders.setOrderTime(LocalDateTime.now());

        //插入一条数据到订单表
        orderMapper.insert(newOrders);

        //新的订单详情数据处理
        for (OrderDetail oldDetail : oldDetails) {
            oldDetail.setOrderId(newOrders.getId());
            oldDetail.setId(null);
            newDetails.add(oldDetail);
        }
        //向订单明细插入n条数据
        orderDetailMapper.insertBatch(newDetails);
    }

    /**
     * conditionSearch 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO vo = new OrderStatisticsVO();
        vo.setConfirmed(orderMapper.getCountByStatus(Orders.CONFIRMED));
        vo.setToBeConfirmed(orderMapper.getCountByStatus(Orders.TO_BE_CONFIRMED));
        vo.setDeliveryInProgress(orderMapper.getCountByStatus(Orders.DELIVERY_IN_PROGRESS));
        return vo;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersConfirmDTO,orders);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param dto
     */
    @Override
    public void rejection(OrdersRejectionDTO dto) {
        Orders orders = new Orders();
        BeanUtils.copyProperties(dto,orders);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setStatus(Orders.CANCELLED);
        orders.setPayStatus(Orders.REFUND);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /***
     * 取消订单
     * @param dto
     */
    @Override
    public void AdminCancel(OrdersCancelDTO dto) {

        Orders orders = new Orders();
        BeanUtils.copyProperties(dto,orders);
        orders.setUserId(BaseContext.getCurrentId());
        orders.setStatus(Orders.CANCELLED);
        orders.setPayStatus(Orders.REFUND);
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {

        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在，并且状态为4
        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setEstimatedDeliveryTime(LocalDateTime.now().plusHours(1));
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {

        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Orders orders = new Orders();
        orders.setId(id);
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在
        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        map.put("type",2);//1表示来单提醒，2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号"+ordersDB.getNumber());
        String json = JSON.toJSONString(map);

        webSocketServer.sendToAllClient(json);

    }
}
